Arna is sandwiched between two tunnels. Head west and you enter the 7.7 kilometre Ulriken Tunnel toward Bergen - an eight-minute journey. Head east and you immediately enter the shorter Arnanipa Tunnel before emerging at Trengereid.
This station only exists because of the Ulriken Tunnel. When it opened in 1964, Arna went from rural backwater to Bergen commuter suburb almost overnight. By car, the same journey to the city centre takes about 40 minutes around the mountain - there's still no road tunnel, though one has been discussed for decades.
Arna became part of Bergen municipality in 1972 and now has around 13,000 residents. It remains one of the most rural parts of the city, with nature reserves, hiking trails up Gullfjellet, and the Arnaelva - Bergen's only salmon-fishing river.
The station was completely rebuilt between 2017 and 2020 as part of the double-tracking project. A second Ulriken tunnel tube opened in December 2020, and since May 2024, commuter trains run four times per hour instead of two.
If you want to ride the heritage railway Gamle Vossebanen, the old station is about ten minutes' walk north of here - that's where steam trains depart for Midttun on summer Sundays.
In March 2024, a freight train ran a red signal here and derailed at the Arnanipa tunnel entrance. The wagons crumpled together in an accordion effect. No one was seriously hurt, but 170 passengers on an incoming Oslo train were stuck in the tunnel for four hours waiting for rescue. The line reopened after eleven days.